{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-43406","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-05-01T14:12:56.007Z","datePublished":"2026-05-08T14:21:46.246Z","dateUpdated":"2026-05-11T22:23:58.001Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T22:23:58.001Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nlibceph: prevent potential out-of-bounds reads in process_message_header()\n\nIf the message frame is (maliciously) corrupted in a way that the\nlength of the control segment ends up being less than the size of the\nmessage header or a different frame is made to look like a message\nframe, out-of-bounds reads may ensue in process_message_header().\n\nPerform an explicit bounds check before decoding the message header."}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","baseScore":9.1,"baseSeverity":"CRITICAL"}}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/ceph/messenger_v2.c"],"versions":[{"version":"cd1a677cad994021b19665ed476aea63f5d54f31","lessThan":"76ccf21a12c5f6d6790bc32c7da82446d877b2f4","status":"affected","versionType":"git"},{"version":"cd1a677cad994021b19665ed476aea63f5d54f31","lessThan":"75582aaa580c11aed4c7731cad6b068b700e7efb","status":"affected","versionType":"git"},{"version":"cd1a677cad994021b19665ed476aea63f5d54f31","lessThan":"50156622eb0888e62541d715a98584480a1bc7cb","status":"affected","versionType":"git"},{"version":"cd1a677cad994021b19665ed476aea63f5d54f31","lessThan":"dbd857a9e1e33ea71eaf3e211877027e533770d1","status":"affected","versionType":"git"},{"version":"cd1a677cad994021b19665ed476aea63f5d54f31","lessThan":"69fe5af33fa3806f398d21c081d73c66e5523bc2","status":"affected","versionType":"git"},{"version":"cd1a677cad994021b19665ed476aea63f5d54f31","lessThan":"035867ae6f18df0aeedb2a57a5b74091bd4e3fe8","status":"affected","versionType":"git"},{"version":"cd1a677cad994021b19665ed476aea63f5d54f31","lessThan":"69fb5d91bba44ecf7eb80530b85fa4fb028921d5","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/ceph/messenger_v2.c"],"versions":[{"version":"5.11","status":"affected"},{"version":"0","lessThan":"5.11","status":"unaffected","versionType":"semver"},{"version":"5.15.203","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.167","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.130","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.78","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.19","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"6.19.9","lessThanOrEqual":"6.19.*","status":"unaffected","versionType":"semver"},{"version":"7.0","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.11","versionEndExcluding":"5.15.203"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.11","versionEndExcluding":"6.1.167"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.11","versionEndExcluding":"6.6.130"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.11","versionEndExcluding":"6.12.78"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.11","versionEndExcluding":"6.18.19"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.11","versionEndExcluding":"6.19.9"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.11","versionEndExcluding":"7.0"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/76ccf21a12c5f6d6790bc32c7da82446d877b2f4"},{"url":"https://git.kernel.org/stable/c/75582aaa580c11aed4c7731cad6b068b700e7efb"},{"url":"https://git.kernel.org/stable/c/50156622eb0888e62541d715a98584480a1bc7cb"},{"url":"https://git.kernel.org/stable/c/dbd857a9e1e33ea71eaf3e211877027e533770d1"},{"url":"https://git.kernel.org/stable/c/69fe5af33fa3806f398d21c081d73c66e5523bc2"},{"url":"https://git.kernel.org/stable/c/035867ae6f18df0aeedb2a57a5b74091bd4e3fe8"},{"url":"https://git.kernel.org/stable/c/69fb5d91bba44ecf7eb80530b85fa4fb028921d5"}],"title":"libceph: prevent potential out-of-bounds reads in process_message_header()","x_generator":{"engine":"bippy-1.2.0"}}}}